#!/bin/bash
#set -o xtrace
#Author: Naveen Joy: najoy@cisco.com
#Usage: boot-vm <vm-name> <network-name> [<availability-zon>] [<fixed_ip>]

###Program Variables###
#Cirros Image:
#image=02fffc39-807f-4890-bdff-48d665cca290
#Ubuntu 14.04 Image
image=ff03d4f4-f68a-4a32-9a8e-ce3f142d8a34
flavor=2
devstack_dir=/home/demo/devstack
source $devstack_dir/openrc admin admin
key_name=demo_key
#######################

if [[ $# < 2 ]]; then
  echo "Usage $0 <vm-name> <network> [<availability-zone>] [<fixed_ip>]"
  echo "When fixed_ip is null, DHCP is used.."
  echo "When the availability-zone is null, the default AZ=nova is used"
  exit 1
fi

vm_name=${1:-}
net_name=${2:-}
az=${3:-"nova"}
fixed_ip=${4:-}

if [[ ${az} = "nova" ]] && [[ -n ${fixed_ip} ]]; then
   gateway=10.0.0.101
else
   gateway=10.0.0.100
fi

function make-user-data-fixed-ip() {
  local -r fixed_ip=$1
  local -r netmask="255.255.255.0"
  local -r gateway=$2
  read -r -d '' userdata << EOF
#cloud-config
bootcmd:
  - ifconfig eth0 ${fixed_ip}
  - ifconfig eth0 netmask ${netmask}
  - route add default gw ${gateway}
  - ifconfig eth0 up

users:
  - default
  - name: ubuntu
    gecos: ubuntu
    ssh_pwauth: True

chpasswd:
  list: |
    root:password
    cloud-user:atomic
    ubuntu:ubuntu
    admin:ubuntu
  expire: False

write_files:
  - content: |
        auto eth0
        iface eth0 inet static
          address ${fixed_ip}
          netmask ${netmask}
          gateway ${gateway}
          dns-nameservers 171.68.226.120 171.70.168.183
          dns-search cisco.com
    path: /etc/network/interfaces.d/eth0.cfg
    permissions: '0644'

runcmd:
  - ifconfig eth0 down
  - ifconfig eth0 up
EOF
}

function make-user-data() {
  read -r -d '' userdata << EOF
#cloud-config
users:
  - default
  - name: ubuntu
    gecos: ubuntu
    ssh_pwauth: True

chpasswd:
  list: |
    root:password
    cloud-user:atomic
    ubuntu:ubuntu
    admin:ubuntu
  expire: False
EOF
}

if [[ -z "${fixed_ip}" ]]; then
   echo "Booting with DHCP - VM:${vm_name}, image:${image}, flavor:${flavor}, network:${net_name}"
   make-user-data
   echo "${userdata}" > userdata
   nova boot --image ${image} --flavor ${flavor} --nic net-name=${net_name} \
             --user-data userdata --key-name ${key_name} --availability-zone ${az} ${vm_name}
else
   echo "Booting with Static IP - VM:${vm_name}, IP:${fixed_ip}, image:${image}, flavor:${flavor}, network:${net_name} and AZ:${az}"
   make-user-data-fixed-ip "${fixed_ip}" "${gateway}"
   echo "${userdata}" > userdata
   nova boot --image ${image} --flavor ${flavor} --nic net-name=${net_name},v4-fixed-ip=${fixed_ip} \
             --user-data userdata --key-name ${key_name} --availability-zone ${az} ${vm_name}
fi
